io_readstr.c

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/* console line input function */

#include "../fb.h"
#include "fb_private_console.h"

char *fb_ConsoleReadStr( char *buffer, ssize_t len )
{
        int k, x, y, cols;
        ssize_t pos = 0;
        char ch[2] = { 0, '\0' };

        if (!__fb_con.inited)
                return fgets(buffer, len, stdin);

        fb_ConsoleGetSize(&cols, NULL);

        do {
                while( ((k = fb_hGetCh(TRUE)) == -1) || (k > 0xFF) )
                        fb_Delay( 10 );

                fb_ConsoleGetXY(&x, &y);

                if (k == 8) {
                        if (pos > 0) {
                                x--;
                                if (x <= 0) {
                                        x = cols;
                                        y--;
                                        if (y <= 0)
                                                x = y = 1;
                                }
                                fb_hTermOut(SEQ_LOCATE, x-1, y-1);
                                fb_hTermOut(SEQ_DEL_CHAR, 0, 0);
                                pos--;
                        }
                } else if (k != '\t') {
                        if (pos < len - 1) {
                                buffer[pos++] = ch[0] = k;
                                fb_ConsolePrintBuffer(ch, 0);
                                if (x == cols)
                                        fputc( '\n', stdout );
                        }
                }
        } while (k != '\r');

        fputc( '\n', stdout );
        buffer[pos] = '\0';

        return buffer;
}